/*
 * Copyright 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.ysl.camera.camera2;

import android.Manifest;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;

import com.bumptech.glide.Glide;
import com.ysl.camera.R;
import com.ysl.camera.camera2.ICamera.FlashState;
import com.ysl.camera.camera2.ICamera.TakePhotoListener;

import java.io.File;

import androidx.annotation.NonNull;
import androidx.core.app.ActivityCompat;
import androidx.core.content.FileProvider;
import androidx.fragment.app.DialogFragment;
import androidx.fragment.app.Fragment;

public class Camera2BasicFragment extends Fragment
        implements View.OnClickListener, ActivityCompat.OnRequestPermissionsResultCallback {

//    /**
//     * Conversion from screen rotation to JPEG orientation.
//     */
//    private static final SparseIntArray ORIENTATIONS = new SparseIntArray();
//    private static final int REQUEST_CAMERA_PERMISSION = 1;
//    private static final String FRAGMENT_DIALOG = "dialog";
//
//    static {
//        ORIENTATIONS.append(Surface.ROTATION_0, 90);
//        ORIENTATIONS.append(Surface.ROTATION_90, 0);
//        ORIENTATIONS.append(Surface.ROTATION_180, 270);
//        ORIENTATIONS.append(Surface.ROTATION_270, 180);
//    }
//
//    /**
//     * Tag for the {@link Log}.
//     */
//    private static final String TAG = "Camera2BasicFragment";
//
//    /**
//     * Camera state: Showing camera preview.
//     */
//    private static final int STATE_PREVIEW = 0;
//
//    /**
//     * Camera state: Waiting for the focus to be locked.
//     */
//    private static final int STATE_WAITING_LOCK = 1;
//
//    /**
//     * Camera state: Waiting for the exposure to be precapture state.
//     */
//    private static final int STATE_WAITING_PRECAPTURE = 2;
//
//    /**
//     * Camera state: Waiting for the exposure state to be something other than precapture.
//     */
//    private static final int STATE_WAITING_NON_PRECAPTURE = 3;
//    private CameraHelper cameraHelper;
//    /**
//     * Camera state: Picture was taken.
//     */
//    private static final int STATE_PICTURE_TAKEN = 4;
//
//    /**
//     * Max preview width that is guaranteed by Camera2 API
//     */
//    private static final int MAX_PREVIEW_WIDTH = 1920;
//
//    /**
//     * Max preview height that is guaranteed by Camera2 API
//     */
//    private static final int MAX_PREVIEW_HEIGHT = 1080;
//
//    /**
//     * {@link TextureView.SurfaceTextureListener} handles several lifecycle events on a
//     * {@link TextureView}.
//     */
//    private final TextureView.SurfaceTextureListener mSurfaceTextureListener
//            = new TextureView.SurfaceTextureListener() {
//
//        @Override
//        public void onSurfaceTextureAvailable(SurfaceTexture texture, int width, int height) {
//            openCamera(width, height);
//        }
//
//        @Override
//        public void onSurfaceTextureSizeChanged(SurfaceTexture texture, int width, int height) {
//            configureTransform(width, height);
//        }
//
//        @Override
//        public boolean onSurfaceTextureDestroyed(SurfaceTexture texture) {
//            return true;
//        }
//
//        @Override
//        public void onSurfaceTextureUpdated(SurfaceTexture texture) {
//        }
//
//    };
//
//    /**
//     * ID of the current {@link CameraDevice}.
//     */
//    private String mCameraId;
//
//    /**
//     * An {@link AutoFitTextureView} for camera preview.
//     */
//    private AutoFitTextureView mTextureView;
//
//    /**
//     * A {@link CameraCaptureSession } for camera preview.
//     */
//    private CameraCaptureSession mCaptureSession;
//
//    /**
//     * A reference to the opened {@link CameraDevice}.
//     */
//    private CameraDevice mCameraDevice;
//
//    /**
//     * The {@link android.util.Size} of camera preview.
//     */
//    private Size mPreviewSize;
//
//    /**
//     * {@link CameraDevice.StateCallback} is called when {@link CameraDevice} changes its state.
//     */
//    private final CameraDevice.StateCallback mStateCallback = new CameraDevice.StateCallback() {
//
//        @Override
//        public void onOpened(@NonNull CameraDevice cameraDevice) {
//            // This method is called when the camera is opened.  We start camera preview here.
//            mCameraOpenCloseLock.release();
//            mCameraDevice = cameraDevice;
//            createCameraPreviewSession();
//        }
//
//        @Override
//        public void onDisconnected(@NonNull CameraDevice cameraDevice) {
//            mCameraOpenCloseLock.release();
//            cameraDevice.close();
//            mCameraDevice = null;
//        }
//
//        @Override
//        public void onError(@NonNull CameraDevice cameraDevice, int error) {
//            mCameraOpenCloseLock.release();
//            cameraDevice.close();
//            mCameraDevice = null;
//            Activity activity = getActivity();
//            if (null != activity) {
//                activity.finish();
//            }
//        }
//
//    };
//
//    /**
//     * An additional thread for running tasks that shouldn't block the UI.
//     */
//    private HandlerThread mBackgroundThread;
//
//    /**
//     * A {@link Handler} for running tasks in the background.
//     */
//    private Handler mBackgroundHandler;
//
//    /**
//     * An {@link ImageReader} that handles still image capture.
//     */
//    private ImageReader mImageReader;
//
//    /**
//     * This is the output file for our picture.
//     */
//    private File mFile;
//
//    /**
//     * This a callback object for the {@link ImageReader}. "onImageAvailable" will be called when a
//     * still image is ready to be saved.
//     */
//    private final ImageReader.OnImageAvailableListener mOnImageAvailableListener
//            = new ImageReader.OnImageAvailableListener() {
//
//        @Override
//        public void onImageAvailable(ImageReader reader) {
//            mBackgroundHandler.post(new ImageSaver(reader.acquireNextImage(), mFile));
//        }
//
//    };
//
//    /**
//     * {@link CaptureRequest.Builder} for the camera preview
//     */
//    private CaptureRequest.Builder mPreviewRequestBuilder;
//
//    /**
//     * {@link CaptureRequest} generated by {@link #mPreviewRequestBuilder}
//     */
//    private CaptureRequest mPreviewRequest;
//
//    /**
//     * The current state of camera state for taking pictures.
//     *
//     * @see #mCaptureCallback
//     */
//    private int mState = STATE_PREVIEW;
//
//    /**
//     * A {@link Semaphore} to prevent the app from exiting before closing the camera.
//     */
//    private Semaphore mCameraOpenCloseLock = new Semaphore(1);
//
//    /**
//     * Whether the current camera device supports Flash or not.
//     */
//    private boolean mFlashSupported;
//
//    /**
//     * Orientation of the camera sensor
//     */
//    private int mSensorOrientation;
//
//    /**
//     * A {@link CameraCaptureSession.CaptureCallback} that handles events related to JPEG capture.
//     */
//    private CameraCaptureSession.CaptureCallback mCaptureCallback
//            = new CameraCaptureSession.CaptureCallback() {
//
//        private void process(CaptureResult result) {
//            switch (mState) {
//                case STATE_PREVIEW: {
//                    // We have nothing to do when the camera preview is working normally.
//                    break;
//                }
//                case STATE_WAITING_LOCK: {
//                    Integer afState = result.get(CaptureResult.CONTROL_AF_STATE);
//                    if (afState == null) {
//                        captureStillPicture();
//                    } else if (CaptureResult.CONTROL_AF_STATE_FOCUSED_LOCKED == afState ||
//                            CaptureResult.CONTROL_AF_STATE_NOT_FOCUSED_LOCKED == afState) {
//                        // CONTROL_AE_STATE can be null on some devices
//                        Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE);
//                        if (aeState == null ||
//                                aeState == CaptureResult.CONTROL_AE_STATE_CONVERGED) {
//                            mState = STATE_PICTURE_TAKEN;
//                            captureStillPicture();
//                        } else {
//                            runPrecaptureSequence();
//                        }
//                    }
//                    break;
//                }
//                case STATE_WAITING_PRECAPTURE: {
//                    // CONTROL_AE_STATE can be null on some devices
//                    Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE);
//                    if (aeState == null ||
//                            aeState == CaptureResult.CONTROL_AE_STATE_PRECAPTURE ||
//                            aeState == CaptureRequest.CONTROL_AE_STATE_FLASH_REQUIRED) {
//                        mState = STATE_WAITING_NON_PRECAPTURE;
//                    }
//                    break;
//                }
//                case STATE_WAITING_NON_PRECAPTURE: {
//                    // CONTROL_AE_STATE can be null on some devices
//                    Integer aeState = result.get(CaptureResult.CONTROL_AE_STATE);
//                    if (aeState == null || aeState != CaptureResult.CONTROL_AE_STATE_PRECAPTURE) {
//                        mState = STATE_PICTURE_TAKEN;
//                        captureStillPicture();
//                    }
//                    break;
//                }
//            }
//        }
//
//        @Override
//        public void onCaptureProgressed(@NonNull CameraCaptureSession session,
//                                        @NonNull CaptureRequest request,
//                                        @NonNull CaptureResult partialResult) {
//            process(partialResult);
//        }
//
//        @Override
//        public void onCaptureCompleted(@NonNull CameraCaptureSession session,
//                                       @NonNull CaptureRequest request,
//                                       @NonNull TotalCaptureResult result) {
//            process(result);
//        }
//
//    };
    private static final String TAG = "Camera2BasicFragment";
    private static final int REQUEST_CAMERA_PERMISSION = 1;
    private static final String FRAGMENT_DIALOG = "dialog";
    private ImageView preview;
    private LinearLayout ll_take_photo;
    private LinearLayout ll_save_delete;
    private ImageView switch_flash;
    private AutoFitTextureView mTextureView;
    private CameraHelper cameraHelper;
    private File mFile;
    private String fileName;

//    private void showToast(final String text) {
//        final Activity activity = getActivity();
//        if (activity != null) {
//            activity.runOnUiThread(new Runnable() {
//                @Override
//                public void run() {
//                    Toast.makeText(activity, text, Toast.LENGTH_SHORT).show();
//                }
//            });
//        }
//    }

//    /**
//     * Given {@code choices} of {@code Size}s supported by a camera, choose the smallest one that
//     * is at least as large as the respective texture view size, and that is at most as large as the
//     * respective max size, and whose aspect ratio matches with the specified value. If such size
//     * doesn't exist, choose the largest one that is at most as large as the respective max size,
//     * and whose aspect ratio matches with the specified value.
//     *
//     * @param choices           The list of sizes that the camera supports for the intended output
//     *                          class
//     * @param textureViewWidth  The width of the texture view relative to sensor coordinate
//     * @param textureViewHeight The height of the texture view relative to sensor coordinate
//     * @param maxWidth          The maximum width that can be chosen
//     * @param maxHeight         The maximum height that can be chosen
//     * @param aspectRatio       The aspect ratio
//     * @return The optimal {@code Size}, or an arbitrary one if none were big enough
//     */
//    private static Size chooseOptimalSize(Size[] choices, int textureViewWidth,
//            int textureViewHeight, int maxWidth, int maxHeight, Size aspectRatio) {
//
//        // Collect the supported resolutions that are at least as big as the preview Surface
//        List<Size> bigEnough = new ArrayList<>();
//        // Collect the supported resolutions that are smaller than the preview Surface
//        List<Size> notBigEnough = new ArrayList<>();
//        int w = aspectRatio.getWidth();
//        int h = aspectRatio.getHeight();
//        for (Size option : choices) {
//            if (option.getWidth() <= maxWidth && option.getHeight() <= maxHeight &&
//                    option.getHeight() == option.getWidth() * h / w) {
//                if (option.getWidth() >= textureViewWidth &&
//                    option.getHeight() >= textureViewHeight) {
//                    bigEnough.add(option);
//                } else {
//                    notBigEnough.add(option);
//                }
//            }
//        }
//
//        // Pick the smallest of those big enough. If there is no one big enough, pick the
//        // largest of those not big enough.
//        if (bigEnough.size() > 0) {
//            return Collections.min(bigEnough, new CompareSizesByArea());
//        } else if (notBigEnough.size() > 0) {
//            return Collections.max(notBigEnough, new CompareSizesByArea());
//        } else {
//            Log.e(TAG, "Couldn't find any suitable preview size");
//            return choices[0];
//        }
//    }

    public static Camera2BasicFragment newInstance() {
        return new Camera2BasicFragment();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_camera2_basic, container, false);
    }

    @Override
    public void onViewCreated(final View view, Bundle savedInstanceState) {
        mTextureView = (AutoFitTextureView) view.findViewById(R.id.texture);
        preview = view.findViewById(R.id.preview);
        ll_take_photo = view.findViewById(R.id.ll_take_photo);
        ll_save_delete = view.findViewById(R.id.ll_save_delete);
        switch_flash = view.findViewById(R.id.switch_flash);
        ImageView iv_back = view.findViewById(R.id.iv_back);
        ImageView take_photo = view.findViewById(R.id.take_photo);
        ImageView switch_camera = view.findViewById(R.id.switch_camera);
        ImageView delete = view.findViewById(R.id.delete);
        ImageView save = view.findViewById(R.id.save);
        view.findViewById(R.id.switch_flash).setOnClickListener(this);
        view.findViewById(R.id.iv_back).setOnClickListener(this);
        view.findViewById(R.id.take_photo).setOnClickListener(this);
        view.findViewById(R.id.switch_camera).setOnClickListener(this);
        view.findViewById(R.id.delete).setOnClickListener(this);
        view.findViewById(R.id.save).setOnClickListener(this);
        cameraHelper = new CameraHelper(getActivity(), mTextureView);
        cameraHelper.setTakePhotoListener(new TakePhotoListener() {
            @Override
            public void onTakePhotoFinish(File file, int photoRotation, int width, int height) {
                setPreview(file);
            }
        });
    }

    private void setPreview(File file) {
        getActivity().runOnUiThread(new Runnable() {
            @Override
            public void run() {
                ll_take_photo.setVisibility(View.GONE);
                ll_save_delete.setVisibility(View.VISIBLE);
                mTextureView.setVisibility(View.GONE);
                switch_flash.setVisibility(View.GONE);
                preview.setVisibility(View.VISIBLE);
                Glide.with(getContext()).load(getUriFromFile(getContext(),file)).into(preview);
                new SingleMediaScanner(getContext(), file.getAbsolutePath(), new SingleMediaScanner.ScanListener() {
                    @Override public void onScanFinish() {
                        Log.i("SingleMediaScanner", "scan finish!");
                    }
                });
            }
        });
    }
    public Uri getUriFromFile(Context context, File file){
        if (Build.VERSION.SDK_INT >= 24) {
            return FileProvider.getUriForFile(context,getContext().getPackageName()+".provider", file);
        } else {
            return Uri.fromFile(file);
        }
    }
    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
//        if (Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.Q) {
            String path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)
                    .getAbsoluteFile() + File.separator + "Camera2Basic";
            File mIVMSFolder = new File(path);
            if (!mIVMSFolder.exists()) {
                mIVMSFolder.mkdirs();
            }
            fileName = System.currentTimeMillis() + ".jpg";
            mFile = new File(mIVMSFolder.getAbsolutePath(), fileName);
//        } else {
//            fileName = System.currentTimeMillis() + ".jpg";
//            //设置保存参数到ContentValues中
//            ContentValues contentValues = new ContentValues();
//            //设置文件名
//            contentValues.put(MediaStore.Images.Media.DISPLAY_NAME, fileName);
//            //android Q中不再使用DATA字段，而用RELATIVE_PATH代替
//            //RELATIVE_PATH是相对路径不是绝对路径;照片存储的地方为：内部存储/Pictures
//            contentValues.put(MediaStore.Images.Media.RELATIVE_PATH, "Pictures/Camera2Basic");
//            //设置文件类型
//            contentValues.put(MediaStore.Images.Media.MIME_TYPE, "image/JPEG");
//            //执行insert操作，向系统文件夹中添加文件夹
//            //EXTERNAL_CONTENT_URI代表外部存储器，该值不变
//            Uri uri = getActivity().getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, contentValues);
//            System.out.println("------------>"+uri.getPath());
//            System.out.println("------------>"+uri.getEncodedPath());
//            mFile = new File(uri.getPath());
//        }

//        mFile = new File(getActivity().getExternalFilesDir(Environment.DIRECTORY_PICTURES), fileName);
//        fileName = System.currentTimeMillis() + ".jpg";
//        mFile = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)
//                .getAbsolutePath()+"Camera2Basic", fileName);
        cameraHelper.setmFile(mFile);
    }

    @Override
    public void onResume() {
        super.onResume();
        cameraHelper.startBackgroundThread();

        // When the screen is turned off and turned back on, the SurfaceTexture is already
        // available, and "onSurfaceTextureAvailable" will not be called. In that case, we can open
        // a camera and start preview from here (otherwise, we wait until the surface is ready in
        // the SurfaceTextureListener).
        if (mTextureView.isAvailable()) {
            cameraHelper.openCamera(mTextureView.getWidth(), mTextureView.getHeight());
        } else {
            mTextureView.setSurfaceTextureListener(cameraHelper.mSurfaceTextureListener);
        }
    }

    @Override
    public void onPause() {
        cameraHelper.closeCamera();
        cameraHelper.stopBackgroundThread();
        super.onPause();
    }

    private void requestCameraPermission() {
        if (shouldShowRequestPermissionRationale(Manifest.permission.CAMERA)) {
            new ConfirmationDialog().show(getChildFragmentManager(), FRAGMENT_DIALOG);
        } else {
            requestPermissions(new String[]{Manifest.permission.CAMERA}, REQUEST_CAMERA_PERMISSION);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
                                           @NonNull int[] grantResults) {
        if (requestCode == REQUEST_CAMERA_PERMISSION) {
            if (grantResults.length != 1 || grantResults[0] != PackageManager.PERMISSION_GRANTED) {
                ErrorDialog.newInstance(getString(R.string.request_permission))
                        .show(getChildFragmentManager(), FRAGMENT_DIALOG);
            }
        } else {
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }

//    /**
//     * Sets up member variables related to camera.
//     *
//     * @param width  The width of available size for camera preview
//     * @param height The height of available size for camera preview
//     */
//    @SuppressWarnings("SuspiciousNameCombination")
//    private void setUpCameraOutputs(int width, int height) {
//        Activity activity = getActivity();
//        CameraManager manager = (CameraManager) activity.getSystemService(Context.CAMERA_SERVICE);
//        try {
//            for (String cameraId : manager.getCameraIdList()) {
//                CameraCharacteristics characteristics
//                        = manager.getCameraCharacteristics(cameraId);
//
//                // We don't use a front facing camera in this sample.
//                Integer facing = characteristics.get(CameraCharacteristics.LENS_FACING);
//                if (facing != null && facing == CameraCharacteristics.LENS_FACING_FRONT) {
//                    continue;
//                }
//
//                StreamConfigurationMap map = characteristics.get(
//                        CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
//                if (map == null) {
//                    continue;
//                }
//
//                // For still image captures, we use the largest available size.
//                Size largest = Collections.max(
//                        Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)),
//                        new CompareSizesByArea());
//                mImageReader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(),
//                        ImageFormat.JPEG, /*maxImages*/2);
//                mImageReader.setOnImageAvailableListener(
//                        mOnImageAvailableListener, mBackgroundHandler);
//
//                // Find out if we need to swap dimension to get the preview size relative to sensor
//                // coordinate.
//                int displayRotation = activity.getWindowManager().getDefaultDisplay().getRotation();
//                //noinspection ConstantConditions
//                mSensorOrientation = characteristics.get(CameraCharacteristics.SENSOR_ORIENTATION);
//                boolean swappedDimensions = false;
//                switch (displayRotation) {
//                    case Surface.ROTATION_0:
//                    case Surface.ROTATION_180:
//                        if (mSensorOrientation == 90 || mSensorOrientation == 270) {
//                            swappedDimensions = true;
//                        }
//                        break;
//                    case Surface.ROTATION_90:
//                    case Surface.ROTATION_270:
//                        if (mSensorOrientation == 0 || mSensorOrientation == 180) {
//                            swappedDimensions = true;
//                        }
//                        break;
//                    default:
//                        Log.e(TAG, "Display rotation is invalid: " + displayRotation);
//                }
//
//                Point displaySize = new Point();
//                activity.getWindowManager().getDefaultDisplay().getSize(displaySize);
//                int rotatedPreviewWidth = width;
//                int rotatedPreviewHeight = height;
//                int maxPreviewWidth = displaySize.x;
//                int maxPreviewHeight = displaySize.y;
//
//                if (swappedDimensions) {
//                    rotatedPreviewWidth = height;
//                    rotatedPreviewHeight = width;
//                    maxPreviewWidth = displaySize.y;
//                    maxPreviewHeight = displaySize.x;
//                }
//
//                if (maxPreviewWidth > MAX_PREVIEW_WIDTH) {
//                    maxPreviewWidth = MAX_PREVIEW_WIDTH;
//                }
//
//                if (maxPreviewHeight > MAX_PREVIEW_HEIGHT) {
//                    maxPreviewHeight = MAX_PREVIEW_HEIGHT;
//                }
//
//                // Danger, W.R.! Attempting to use too large a preview size could  exceed the camera
//                // bus' bandwidth limitation, resulting in gorgeous previews but the storage of
//                // garbage capture data.
//                mPreviewSize = chooseOptimalSize(map.getOutputSizes(SurfaceTexture.class),
//                        rotatedPreviewWidth, rotatedPreviewHeight, maxPreviewWidth,
//                        maxPreviewHeight, largest);
//
//                // We fit the aspect ratio of TextureView to the size of preview we picked.
//                int orientation = getResources().getConfiguration().orientation;
//                if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
//                    mTextureView.setAspectRatio(
//                            mPreviewSize.getWidth(), mPreviewSize.getHeight());
//                } else {
//                    mTextureView.setAspectRatio(
//                            mPreviewSize.getHeight(), mPreviewSize.getWidth());
//                }
//
//                // Check if the flash is supported.
//                Boolean available = characteristics.get(CameraCharacteristics.FLASH_INFO_AVAILABLE);
//                mFlashSupported = available == null ? false : available;
//
//                mCameraId = cameraId;
//                return;
//            }
//        } catch (CameraAccessException e) {
//            e.printStackTrace();
//        } catch (NullPointerException e) {
//            // Currently an NPE is thrown when the Camera2API is used but not supported on the
//            // device this code runs.
//            ErrorDialog.newInstance(getString(R.string.camera_error))
//                    .show(getChildFragmentManager(), FRAGMENT_DIALOG);
//        }
//    }
//
//    /**
//     * Opens the camera specified by {@link Camera2BasicFragment#mCameraId}.
//     */
//    private void openCamera(int width, int height) {
//        if (ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.CAMERA)
//                != PackageManager.PERMISSION_GRANTED) {
//            requestCameraPermission();
//            return;
//        }
//        setUpCameraOutputs(width, height);
//        configureTransform(width, height);
//        Activity activity = getActivity();
//        CameraManager manager = (CameraManager) activity.getSystemService(Context.CAMERA_SERVICE);
//        try {
//            if (!mCameraOpenCloseLock.tryAcquire(2500, TimeUnit.MILLISECONDS)) {
//                throw new RuntimeException("Time out waiting to lock camera opening.");
//            }
//            manager.openCamera(mCameraId, mStateCallback, mBackgroundHandler);
//        } catch (CameraAccessException e) {
//            e.printStackTrace();
//        } catch (InterruptedException e) {
//            throw new RuntimeException("Interrupted while trying to lock camera opening.", e);
//        }
//    }
//
//    /**
//     * Closes the current {@link CameraDevice}.
//     */
//    private void closeCamera() {
//        try {
//            mCameraOpenCloseLock.acquire();
//            if (null != mCaptureSession) {
//                mCaptureSession.close();
//                mCaptureSession = null;
//            }
//            if (null != mCameraDevice) {
//                mCameraDevice.close();
//                mCameraDevice = null;
//            }
//            if (null != mImageReader) {
//                mImageReader.close();
//                mImageReader = null;
//            }
//        } catch (InterruptedException e) {
//            throw new RuntimeException("Interrupted while trying to lock camera closing.", e);
//        } finally {
//            mCameraOpenCloseLock.release();
//        }
//    }
//
//    /**
//     * Starts a background thread and its {@link Handler}.
//     */
//    private void startBackgroundThread() {
//        mBackgroundThread = new HandlerThread("CameraBackground");
//        mBackgroundThread.start();
//        mBackgroundHandler = new Handler(mBackgroundThread.getLooper());
//    }
//
//    /**
//     * Stops the background thread and its {@link Handler}.
//     */
//    private void stopBackgroundThread() {
//        mBackgroundThread.quitSafely();
//        try {
//            mBackgroundThread.join();
//            mBackgroundThread = null;
//            mBackgroundHandler = null;
//        } catch (InterruptedException e) {
//            e.printStackTrace();
//        }
//    }
//
//    /**
//     * Creates a new {@link CameraCaptureSession} for camera preview.
//     */
//    private void createCameraPreviewSession() {
//        try {
//            SurfaceTexture texture = mTextureView.getSurfaceTexture();
//            assert texture != null;
//
//            // We configure the size of default buffer to be the size of camera preview we want.
//            texture.setDefaultBufferSize(mPreviewSize.getWidth(), mPreviewSize.getHeight());
//
//            // This is the output Surface we need to start preview.
//            Surface surface = new Surface(texture);
//
//            // We set up a CaptureRequest.Builder with the output Surface.
//            mPreviewRequestBuilder
//                    = mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
//            mPreviewRequestBuilder.addTarget(surface);
//
//            // Here, we create a CameraCaptureSession for camera preview.
//            mCameraDevice.createCaptureSession(Arrays.asList(surface, mImageReader.getSurface()),
//                    new CameraCaptureSession.StateCallback() {
//
//                        @Override
//                        public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
//                            // The camera is already closed
//                            if (null == mCameraDevice) {
//                                return;
//                            }
//
//                            // When the session is ready, we start displaying the preview.
//                            mCaptureSession = cameraCaptureSession;
//                            try {
//                                // Auto focus should be continuous for camera preview.
//                                mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_MODE,
//                                        CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
//                                // Flash is automatically enabled when necessary.
//                                setAutoFlash(mPreviewRequestBuilder);
//
//                                // Finally, we start displaying the camera preview.
//                                mPreviewRequest = mPreviewRequestBuilder.build();
//                                mCaptureSession.setRepeatingRequest(mPreviewRequest,
//                                        mCaptureCallback, mBackgroundHandler);
//                            } catch (CameraAccessException e) {
//                                e.printStackTrace();
//                            }
//                        }
//
//                        @Override
//                        public void onConfigureFailed(
//                                @NonNull CameraCaptureSession cameraCaptureSession) {
//                            showToast("Failed");
//                        }
//                    }, null
//            );
//        } catch (CameraAccessException e) {
//            e.printStackTrace();
//        }
//    }
//
//    /**
//     * Configures the necessary {@link android.graphics.Matrix} transformation to `mTextureView`.
//     * This method should be called after the camera preview size is determined in
//     * setUpCameraOutputs and also the size of `mTextureView` is fixed.
//     *
//     * @param viewWidth  The width of `mTextureView`
//     * @param viewHeight The height of `mTextureView`
//     */
//    private void configureTransform(int viewWidth, int viewHeight) {
//        Activity activity = getActivity();
//        if (null == mTextureView || null == mPreviewSize || null == activity) {
//            return;
//        }
//        int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
//        Matrix matrix = new Matrix();
//        RectF viewRect = new RectF(0, 0, viewWidth, viewHeight);
//        RectF bufferRect = new RectF(0, 0, mPreviewSize.getHeight(), mPreviewSize.getWidth());
//        float centerX = viewRect.centerX();
//        float centerY = viewRect.centerY();
//        if (Surface.ROTATION_90 == rotation || Surface.ROTATION_270 == rotation) {
//            bufferRect.offset(centerX - bufferRect.centerX(), centerY - bufferRect.centerY());
//            matrix.setRectToRect(viewRect, bufferRect, Matrix.ScaleToFit.FILL);
//            float scale = Math.max(
//                    (float) viewHeight / mPreviewSize.getHeight(),
//                    (float) viewWidth / mPreviewSize.getWidth());
//            matrix.postScale(scale, scale, centerX, centerY);
//            matrix.postRotate(90 * (rotation - 2), centerX, centerY);
//        } else if (Surface.ROTATION_180 == rotation) {
//            matrix.postRotate(180, centerX, centerY);
//        }
//        mTextureView.setTransform(matrix);
//    }


//    /**
//     * Lock the focus as the first step for a still image capture.
//     */
//    private void lockFocus() {
//        try {
//            // This is how to tell the camera to lock focus.
//            mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER,
//                    CameraMetadata.CONTROL_AF_TRIGGER_START);
//            // Tell #mCaptureCallback to wait for the lock.
//            mState = STATE_WAITING_LOCK;
//            mCaptureSession.capture(mPreviewRequestBuilder.build(), mCaptureCallback,
//                    mBackgroundHandler);
//        } catch (CameraAccessException e) {
//            e.printStackTrace();
//        }
//    }
//
//    /**
//     * Run the precapture sequence for capturing a still image. This method should be called when
//     * we get a response in {@link #mCaptureCallback} from {@link #lockFocus()}.
//     */
//    private void runPrecaptureSequence() {
//        try {
//            // This is how to tell the camera to trigger.
//            mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER,
//                    CaptureRequest.CONTROL_AE_PRECAPTURE_TRIGGER_START);
//            // Tell #mCaptureCallback to wait for the precapture sequence to be set.
//            mState = STATE_WAITING_PRECAPTURE;
//            mCaptureSession.capture(mPreviewRequestBuilder.build(), mCaptureCallback,
//                    mBackgroundHandler);
//        } catch (CameraAccessException e) {
//            e.printStackTrace();
//        }
//    }
//
//    /**
//     * Capture a still picture. This method should be called when we get a response in
//     * {@link #mCaptureCallback} from both {@link #lockFocus()}.
//     */
//    private void captureStillPicture() {
//        try {
//            final Activity activity = getActivity();
//            if (null == activity || null == mCameraDevice) {
//                return;
//            }
//            // This is the CaptureRequest.Builder that we use to take a picture.
//            final CaptureRequest.Builder captureBuilder =
//                    mCameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);
//            captureBuilder.addTarget(mImageReader.getSurface());
//
//            // Use the same AE and AF modes as the preview.
//            captureBuilder.set(CaptureRequest.CONTROL_AF_MODE,
//                    CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);
//            setAutoFlash(captureBuilder);
//
//            // Orientation
//            int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
//            captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, getOrientation(rotation));
//
//            CameraCaptureSession.CaptureCallback CaptureCallback
//                    = new CameraCaptureSession.CaptureCallback() {
//
//                @Override
//                public void onCaptureCompleted(@NonNull CameraCaptureSession session,
//                                               @NonNull CaptureRequest request,
//                                               @NonNull TotalCaptureResult result) {
//                    showToast("Saved: " + mFile);
//                    Log.d(TAG, mFile.toString());
//                    unlockFocus();
//                }
//            };
//
//            mCaptureSession.stopRepeating();
//            mCaptureSession.abortCaptures();
//            mCaptureSession.capture(captureBuilder.build(), CaptureCallback, null);
//        } catch (CameraAccessException e) {
//            e.printStackTrace();
//        }
//    }
//
//    /**
//     * Retrieves the JPEG orientation from the specified screen rotation.
//     *
//     * @param rotation The screen rotation.
//     * @return The JPEG orientation (one of 0, 90, 270, and 360)
//     */
//    private int getOrientation(int rotation) {
//        // Sensor orientation is 90 for most devices, or 270 for some devices (eg. Nexus 5X)
//        // We have to take that into account and rotate JPEG properly.
//        // For devices with orientation of 90, we simply return our mapping from ORIENTATIONS.
//        // For devices with orientation of 270, we need to rotate the JPEG 180 degrees.
//        return (ORIENTATIONS.get(rotation) + mSensorOrientation + 270) % 360;
//    }
//
//    /**
//     * Unlock the focus. This method should be called when still image capture sequence is
//     * finished.
//     */
//    private void unlockFocus() {
//        try {
//            // Reset the auto-focus trigger
//            mPreviewRequestBuilder.set(CaptureRequest.CONTROL_AF_TRIGGER,
//                    CameraMetadata.CONTROL_AF_TRIGGER_CANCEL);
//            setAutoFlash(mPreviewRequestBuilder);
//            mCaptureSession.capture(mPreviewRequestBuilder.build(), mCaptureCallback,
//                    mBackgroundHandler);
//            // After this, the camera will go back to the normal state of preview.
//            mState = STATE_PREVIEW;
//            mCaptureSession.setRepeatingRequest(mPreviewRequest, mCaptureCallback,
//                    mBackgroundHandler);
//        } catch (CameraAccessException e) {
//            e.printStackTrace();
//        }
//    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.take_photo:
                cameraHelper.lockFocus();
                ll_save_delete.setVisibility(View.VISIBLE);
                ll_take_photo.setVisibility(View.GONE);
                break;
            case R.id.switch_flash:
                flashSwitch();
                break;
            case R.id.iv_back:
                getActivity().finish();
                break;
            case R.id.switch_camera:
                switchCamera();
                break;
            case R.id.delete:
                ll_save_delete.setVisibility(View.GONE);
                ll_take_photo.setVisibility(View.VISIBLE);
                mTextureView.setVisibility(View.VISIBLE);
                switch_flash.setVisibility(View.VISIBLE);
                if (mFile.exists()) mFile.delete();
                preview.setVisibility(View.GONE);
                break;
            case R.id.save:
                getActivity().finish();
                break;
        }
    }
    private ICamera.CameraType mNowCameraType = ICamera.CameraType.BACK;
    public void switchCamera() {
        if (mNowCameraType == ICamera.CameraType.FRONT) {
//            cameraHelper.switchCamera(ICamera.CameraType.BACK);
            mNowCameraType = ICamera.CameraType.BACK;
        } else {
//            cameraHelper.switchCamera(ICamera.CameraType.FRONT);
            mNowCameraType = ICamera.CameraType.FRONT;
        }
        cameraHelper.switchCamera(mNowCameraType);
    }
    public void flashSwitch() {
        Object o = switch_flash.getTag();
        if (o == null || ((int) o) == 0) {
            switch_flash.setImageResource(R.drawable.flash_auto);
            switch_flash.setTag(1);
            cameraHelper.flashSwitchState(FlashState.AUTO);
        } else if (((int) o) == 1) {
            switch_flash.setImageResource(R.drawable.flash_open);
            switch_flash.setTag(2);
            cameraHelper.flashSwitchState(FlashState.OPEN);
        } else {
            switch_flash.setImageResource(R.drawable.flash_close);
            switch_flash.setTag(0);
            cameraHelper.flashSwitchState(FlashState.CLOSE);
        }
    }
//    private void setAutoFlash(CaptureRequest.Builder requestBuilder) {
//        if (mFlashSupported) {
//            requestBuilder.set(CaptureRequest.CONTROL_AE_MODE,
//                    CaptureRequest.CONTROL_AE_MODE_ON_AUTO_FLASH);
//        }
//    }
//
//    /**
//     * Saves a JPEG {@link Image} into the specified {@link File}.
//     */
//    private class ImageSaver implements Runnable {
//
//        /**
//         * The JPEG image
//         */
//        private final Image mImage;
//        /**
//         * The file we save the image into.
//         */
//        private final File mFile;
//
//        ImageSaver(Image image, File file) {
//            mImage = image;
//            mFile = file;
//        }
//
//        @Override
//        public void run() {
//            ByteBuffer buffer = mImage.getPlanes()[0].getBuffer();
//            byte[] bytes = new byte[buffer.remaining()];
//            buffer.get(bytes);
//            FileOutputStream output = null;
//            try {
//                output = new FileOutputStream(mFile);
//                output.write(bytes);
//            } catch (IOException e) {
//                e.printStackTrace();
//            } finally {
//                mImage.close();
//                if (null != output) {
//                    try {
//                        output.close();
//                    } catch (IOException e) {
//                        e.printStackTrace();
//                    }
//                }
//                setPreview(mFile);
//            }
//        }
//
//    }
//
//    /**
//     * Compares two {@code Size}s based on their areas.
//     */
//    static class CompareSizesByArea implements Comparator<Size> {
//
//        @Override
//        public int compare(Size lhs, Size rhs) {
//            // We cast here to ensure the multiplications won't overflow
//            return Long.signum((long) lhs.getWidth() * lhs.getHeight() -
//                    (long) rhs.getWidth() * rhs.getHeight());
//        }
//
//    }

    /**
     * Shows an error message dialog.
     */
    public static class ErrorDialog extends DialogFragment {

        private static final String ARG_MESSAGE = "message";

        public static ErrorDialog newInstance(String message) {
            ErrorDialog dialog = new ErrorDialog();
            Bundle args = new Bundle();
            args.putString(ARG_MESSAGE, message);
            dialog.setArguments(args);
            return dialog;
        }

        @NonNull
        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            final Activity activity = getActivity();
            return new AlertDialog.Builder(activity)
                    .setMessage(getArguments().getString(ARG_MESSAGE))
                    .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            activity.finish();
                        }
                    })
                    .create();
        }

    }

    /**
     * Shows OK/Cancel confirmation dialog about camera permission.
     */
    public static class ConfirmationDialog extends DialogFragment {

        @NonNull
        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            final Fragment parent = getParentFragment();
            return new AlertDialog.Builder(getActivity())
                    .setMessage(R.string.request_permission)
                    .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            parent.requestPermissions(new String[]{Manifest.permission.CAMERA},
                                    REQUEST_CAMERA_PERMISSION);
                        }
                    })
                    .setNegativeButton(android.R.string.cancel,
                            new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog, int which) {
                                    Activity activity = parent.getActivity();
                                    if (activity != null) {
                                        activity.finish();
                                    }
                                }
                            })
                    .create();
        }
    }

}
